In situ approach of cementite nanoparticles encapsulated with nitrogen-doped graphitic shells as anode nanomaterials for Li-ion and Na-ion batteries. Issue 58 (24th September 2018)

• Record Type: Journal Article
• Authors: Li, Na Na; Sheng, Zhao Min; Tian, Hao Liang; Chang, Cheng Kang; Jia, Run Ping; Han, Sheng
• Is Part Of: RSC advances. Volume 8:Issue 58(2018)
• Page Start: 33030
• Page End: 33034
• Publication Date: 2018-09-24
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra05544k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Novel Fe3 C nanoparticles encapsulated with nitrogen-doped graphitic shells were synthesized by floating catalytic pyrolysis. Abstract : Novel Fe3 C nanoparticles encapsulated with nitrogen-doped graphitic shells were synthesized by floating catalytic pyrolysis. Due to the short synthesis time and controllable pyrolytic temperature, the diameters of Fe3 C core nanoparticles ranged from 5 to 15 nm (Fe3 C@NGS900 prepared at 900 °C) and the average thickness of N-doped graphitic shells was ∼1.2 nm, leading to their high electrochemical performance: specific capacity of 1300 mA h g −1 at current density 0.2 A g −1, outstanding rate capability of 939 mA h g −1 at 3 A g −1, improved initial coulombic efficiency (Fe3 C@NGS900: 72.1% vs. NGS900 (pure graphitic shells): 52%) for lithium ion batteries (LIBs), and impressive long-term cycle performance (1399 mA h g −1 maintained at 3 A g −1 after 500 cycles for LIBs; 214 mA h g −1 maintained at 1 A g −1 after 500 cycles for sodium ion batteries).